Residual iron discharging system for overhaul of blast furnace

Abstract

The utility model provides a blast furnace overhaul residual iron discharging system which comprises a blast furnace body, a bearing frame, an iron receiving ladle, a bearing chute and a translation driving piece, and the translation driving piece is connected with the bearing frame; and the bearing chutes are connected between the two adjacent iron receiving ladles, and when the translation driving piece drives the bearing frame to move, the bearing chutes are used for bearing the residual iron discharged from the discharging opening of the blast furnace body and guiding the residual iron to the two ends till the residual iron flows into the two iron receiving ladles correspondingly. According to the blast furnace overhaul residual iron discharging system provided by the utility model, the iron receiving ladles on the supporting frame are driven by the translation driving piece to horizontally move, so that different iron receiving ladles correspond to the residual iron chutes up and down, and the residual iron in the blast furnace body is effectively discharged; the iron receiving ladle can still receive residual iron discharged by the blast furnace body in the moving process, the residual iron is conveyed into the two adjacent iron receiving ladles through the receiving chute, and the discharging efficiency and safety of the residual iron are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace major overhaul, and more specifically, relates to a system for discharging residual iron outside during blast furnace major overhaul. Background Art

[0002] After the blast furnace is shut down and the air is cut off, in order to reduce the condensation time of the residual iron in the hearth, it is necessary to discharge the residual iron within the shortest possible time. Since the amount of residual iron in the blast furnace is large, when using the existing iron receiving ladles to receive the residual iron, there is a problem that multiple iron receiving ladles need to be used to receive the residual iron. During this process, it is necessary to replace the iron receiving ladles. The above replacement process is not only complicated in operation, but also has the problem that it is difficult to completely stop the discharge of residual iron, which will not only cause waste of materials, but also make the discharge process have a certain degree of danger and there are certain potential safety hazards. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a system for discharging residual iron outside during blast furnace major overhaul, which can effectively receive the residual iron in the blast furnace, improve the discharge efficiency of the residual iron, and improve the safety of operation.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a system for discharging residual iron outside during blast furnace major overhaul, including a blast furnace body, a supporting bracket, an iron receiving ladle, a receiving chute and a translation driving member. A plurality of iron receiving ladles are arranged at intervals on the supporting bracket. The translation driving member is connected to the supporting bracket and is used to drive the supporting bracket to move horizontally so that one of the iron receiving ladles corresponds vertically to the residual iron chute of the blast furnace body;

[0005] Wherein, the receiving chute is connected between two adjacent iron receiving ladles. When the translation driving member drives the supporting bracket to move, the receiving chute is used to receive the residual iron discharged from the discharge port of the blast furnace body and guide the residual iron to flow into the two iron receiving ladles at both ends respectively.

[0006] In a possible implementation manner, the supporting bracket is provided with lower support seats that are arranged in one-to-one correspondence with the iron receiving ladles and are used to support and limit the iron receiving ladles. Two adjacent iron receiving ladles are connected by a connecting member.

[0007] In some embodiments, the supporting bracket and the receiving chute respectively extend along the tangential direction of the blast furnace body. The iron receiving ladles are arranged at intervals along the extending direction of the supporting bracket. The central axis of the receiving chute extends along the radial direction of the iron receiving ladle.

[0008] In a possible implementation manner, the receiving chute is connected to the upper edge of the iron receiving ladle through a connecting seat. The connecting seat has an installation cavity with an opening downward and is used to accommodate the upper edge of the iron receiving ladle. A tightening member that abuts against the outer wall of the upper edge of the iron receiving ladle is threadedly connected to the connecting seat.

[0009] In a possible implementation manner, the receiving chute has a drainage cavity with an opening upward and penetrating along its extending direction. The cross section of the bottom wall of the drainage cavity is semi-circular.

[0010] In some embodiments, both ends of the receiving chute extend into adjacent two iron ladles respectively, and diversion parts extending arcuately outward and downward are respectively arranged at both ends of the receiving chute, and the diversion parts are used for guiding the residual iron into the iron ladles.

[0011] In a possible implementation manner, the residual iron discharging system for BF body overhaul further includes a translation track extending tangentially along the BF body, a supporting bracket is rollingly connected above the translation track, and the translation driving part is a locomotive.

[0012] In some embodiments, converging parts for guiding the residual iron into the receiving chute are respectively arranged on both side edges of the receiving chute, and the converging parts extend obliquely upward toward the side away from the central axis of the receiving chute.

[0013] In a possible implementation manner, the residual iron discharging system for BF overhaul further includes a BF top cover arranged at the top of the BF body and a pressurizing air pump connected to the lower part of the BF body, and the pressurizing air pump is used for pressurizing the BF body to enable the residual iron in the BF body to be discharged through the discharge port.

[0014] In a possible implementation manner, an alloy refractory layer is arranged on the inner wall of the receiving chute.

[0015] The solution shown in the embodiments of the present application, compared with the prior art, the residual iron discharging system for BF overhaul provided by the embodiments of the present application drives the iron ladle on the supporting bracket to horizontally move by using the translation driving part, so that different iron ladles are vertically corresponding to the residual iron chute, thereby effectively discharging the residual iron in the BF body. By arranging a receiving chute between two adjacent iron ladles, the iron ladle can still receive the residual iron discharged from the BF body during the moving process, and the residual iron is sent into the two adjacent iron ladles through the receiving chute, which omits the cumbersome process of stopping the residual iron chute during the replacement of the iron ladle, effectively improves the discharging efficiency of the residual iron, and improves the safety during the discharging process of the residual iron. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0017] Figure 1 It is the front view structural schematic diagram of the residual iron discharging system for BF overhaul provided by the embodiments of the present invention;

[0018] Figure 2 For the embodiments of the present invention Figure 1 It is the partial enlarged sectional view structural schematic diagram of I in the embodiments;

[0019] Figure 3 It is a top - view structural schematic diagram of the residual iron external discharge system provided by the embodiment of the present utility model for blast furnace overhaul;

[0020] Figure 4 For the embodiment of the present utility model Figure 1 The front - view sectional structural schematic diagram of the receiving chute;

[0021] Figure 5 For the embodiment of the present utility model Figure 4 The sectional structural schematic diagram of A - A in it;

[0022] Figure 6 For the embodiment of the present utility model Figure 4 The structural schematic diagram in the direction of B in it;

[0023] Figure 7 For the embodiment of the present utility model Figure 1 The front - view sectional structural schematic diagram of the lower support seat and the iron - receiving ladle.

[0024] Among them, each reference numeral in the figure:

[0025] 1, blast furnace body; 11, blast furnace cover; 12, pressurized air pump; 13, residual iron chute; 2, supporting bracket; 21, lower support seat; 22, placement cavity; 3, iron - receiving ladle; 31, connecting piece; 4, receiving chute; 41, connecting seat; 42, tightening piece; 43, drainage cavity; 44, guiding part; 45, converging part; 5, translation driving part; 51, translation track. Specific embodiments

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or several of such features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise specifically defined.

[0028] Please refer to Figures 1 to 7 simultaneously. Now, the blast furnace overhaul residual iron external discharge system provided by the present invention will be described. The blast furnace overhaul residual iron external discharge system of the blast furnace body 1 includes the blast furnace body 1, a support bracket 2, an iron receiving ladle 3, a receiving chute 4, and a translation driving member 5. Several iron receiving ladles 3 are spaced on the support bracket 2. The translation driving member 5 is connected to the support bracket 2 and is used to drive the support bracket 2 to move horizontally so that one of the iron receiving ladles 3 is vertically aligned with the residual iron chute 13 of the blast furnace body 1.

[0029] Among them, the receiving chute 4 is connected between two adjacent iron receiving ladles 3. When the translation driving member 5 drives the support bracket 2 to move, the receiving chute 4 is used to receive the residual iron discharged from the discharge port of the blast furnace body 1 and guide the residual iron to both ends to flow into the two iron receiving ladles 3 respectively.

[0030] Compared with the prior art, the blast furnace overhaul residual iron external discharge system provided in this embodiment uses the translation driving member 5 to drive the iron receiving ladle 3 on the support bracket 2 to move horizontally, so that different iron receiving ladles 3 are vertically aligned with the residual iron chute 13, realizing the effective discharge of the residual iron in the blast furnace body 1. By arranging the receiving chute 4 between two adjacent iron receiving ladles 3, the iron receiving ladle 3 can still receive the residual iron discharged from the blast furnace body 1 during the movement process. The receiving chute 4 sends the residual iron into the two adjacent iron receiving ladles 3, eliminating the cumbersome process of stopping the residual iron chute 13 during the replacement of the iron receiving ladle 3, effectively improving the discharge efficiency of the residual iron and enhancing the safety during the residual iron discharge process.

[0031] In a possible implementation manner, please refer to Figures 1 to 7, a lower support seat 21 corresponding to and for supporting and limiting the iron ladle 3 one by one is provided on the support bracket 2, and adjacent iron ladles 3 are connected by a connecting member 31.

[0032] In this embodiment, the lower support seat 21 provided on the support bracket 2 is used to support the iron ladle 3. A placement cavity 22 with an upward opening and for placing the iron ladle 3 is provided on the lower support seat 21. The placement cavity 22 can effectively accommodate the lower part of the iron ladle 3 and can effectively limit the lower part of the iron ladle 3, ensuring that the iron ladle 3 can have good position stability during the process of receiving the residual iron. On this basis, components such as set screws that can lock the relative positions of the two can also be provided between the lower support seat 21 and the iron ladle 3 to further ensure the effective locking of the relative positions and ensure that the iron ladle 3 can follow the support bracket 2 for reliable translational movement.

[0033] In some embodiments, please refer to Figures 1 to 7 together. The support bracket 2 and the receiving chute 4 extend along the tangential direction of the blast furnace body 1 respectively. The iron ladles 3 are arranged at intervals along the extending direction of the support bracket 2. The central axis of the receiving chute 4 extends along the radial direction of the iron ladle 3.

[0034] In this embodiment, in order to facilitate driving the iron ladle 3 to change its position by the translation driving member 5 and ensure that the residual iron chute 13 can effectively correspond to the next iron ladle 3 after the change, the support bracket 2 extends along the tangential direction of the blast furnace body 1. The interval direction of the iron ladles 3 is the same as the extending direction of the support bracket 2. By driving the support bracket 2 to move along the tangential direction of the blast furnace body 1 by the translation driving member 5, the effect that the next iron ladle 3 moves forward and corresponds to the residual iron chute 13 up and down is achieved, ensuring the smooth discharge of the residual iron chute 13, improving the discharge efficiency of the residual iron, and realizing the process of receiving the residual iron efficiently and safely.

[0035] In a possible implementation manner, please refer to Figures 1 to 7 together. The receiving chute 4 is connected to the upper edge of the iron ladle 3 through a connecting seat 41. The connecting seat 41 has an installation cavity with a downward opening and for accommodating the upper edge of the iron ladle 3. A tightening member 42 that abuts against the outer wall of the upper edge of the iron ladle 3 is threadedly connected to the connecting seat 41.

[0036] In this embodiment, the receiving chute 4 is detachably connected between adjacent iron ladles 3. The connecting seat 41 at the bottom of the supporting chute is clamped on the upper edge of the iron ladle 3. The upper edge of the iron ladle 3 enters the installation cavity of the connecting seat 41. The relative positions of the connecting seat 41 and the iron ladle 3 are locked by the tightening member 42, so that the receiving chute 4 and the iron ladle 3 form a reliable connection, facilitating the receiving chute 4 to smoothly guide the residual iron into the iron ladle 3.

[0037] In a possible implementation manner, please refer to Figures 1 to 7, the receiving chute 4 has a drainage cavity 43 with an upward opening and extending through along its extending direction, and the cross-section of the bottom wall of the drainage cavity 43 is semi-circular.

[0038] In this embodiment, the two ends of the receiving chute 4 respectively extend into two adjacent iron ladles 3 in a one-to-one correspondence, so that the residual iron in the residual iron chute 13 can be smoothly guided into the iron ladles 3. The drainage cavity 43 on the receiving chute 4 can effectively guide the residual iron, so that the residual iron in the drainage cavity 43 can be smoothly guided into two adjacent iron ladles 3, avoiding the problem of poor flow of the residual iron, and further avoiding the waste caused by the accumulation of the residual iron inside the receiving chute 4.

[0039] In some embodiments, please refer to Figures 1 to 7 , the two ends of the receiving chute 4 respectively extend into two adjacent iron ladles 3, and the two ends of the receiving chute 4 are respectively provided with diversion parts 44 extending in an arc shape outward and downward, and the diversion parts 44 are used to guide the residual iron into the iron ladle 3. The setting of the diversion parts 44 can improve the discharging efficiency of the residual iron into the iron ladle 3, avoid the accumulation of the residual iron at the end of the receiving chute 4 from affecting the orderly guiding of the residual iron, has a good drainage effect, improves the guiding efficiency of the residual iron, and at the same time also avoids the safety risk caused by the leakage of the residual iron.

[0040] In a possible implementation manner, please refer to Figures 1 to 7 , the external discharge system for the residual iron during the major overhaul of the blast furnace body 1 further includes a translation track 51 extending along the tangential direction of the blast furnace body 1, the support frame 2 is connected to the upper part of the translation track 51 in a rolling manner, and the translation driving member 5 is a locomotive. By setting the translation track 51, the rolling cooperation with the upper support frame 2 can be realized. The bottom of the support frame 2 is provided with rollers, and the translation driving member 5 adopts the traction mode of a locomotive, which can reduce the resistance during the traction process, reduce the energy consumption of the translation driving member 5, and ensure the reliability of the traction of the support frame 2 and the iron ladle 3.

[0041] In some embodiments, please refer to Figures 1 to 7 , the two side edges of the receiving chute 4 are respectively provided with converging parts 45 for guiding the residual iron into the receiving chute 4, and the converging parts 45 extend obliquely upward toward the side away from the central axis of the receiving chute 4.

[0042] In this embodiment, the converging parts 45 on both sides of the receiving chute 4 respectively extend obliquely outward and upward, so that the receiving chute 4 has a larger receiving area on the horizontal plane, can gather and collect the residual iron in the upper residual iron chute 13, avoid the safety risk and material waste caused by the splashing of the residual iron, and improve the safety during the discharge of the residual iron.

[0043] In a possible implementation manner, please refer to Figures 1 to 7, the residual iron external discharge system for blast furnace overhaul also includes a blast furnace top cover 11 provided at the top of the blast furnace body 1 and a pressurized air pump 12 connected to the lower part of the blast furnace body 1. The pressurized air pump 12 is used to pressurize the inside of the blast furnace body 1 so that the residual iron in the blast furnace body 1 is discharged through the discharge port.

[0044] In this embodiment, the effective sealing of the inside of the blast furnace body 1 is achieved by providing a blast furnace top cover 11 at the top of the blast furnace body 1. Then, gas is sent into the blast furnace body 1 through the pressurized air pump 12 at the lower part of the blast furnace body 1 to pressurize the blast furnace body 1. Under the action of the above pressure, the residual iron in the blast furnace body 1 is convenient to flow out comprehensively, avoiding accumulation and residue in the blast furnace body 1.

[0045] Specifically, the air pressure of the pressurized air pump 12 is 15 - 20 MPa, which improves the discharge efficiency of the residual iron, reduces the residual amount of the residual iron in the blast furnace body 1, and has a good use effect.

[0046] In a possible implementation manner, an alloy refractory layer is provided on the inner wall of the receiving chute 4. The alloy refractory layer has a good protective effect and helps to improve the service life of the receiving chute 4. Specifically, the alloy refractory layer can adopt a high-chromium alloy wear-resistant layer. The high-chromium alloy wear-resistant layer can not only form a strong protective film on the surface of the receiving chute 4, but also effectively resist friction, wear and corrosion, helping to extend the service life of the component.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The residual iron discharge system for blast furnace overhaul is characterized by: The invention comprises a blast furnace body (1), a support frame (2), an iron receiving ladle (3), a receiving chute (4) and a translation driving member (5), wherein a plurality of the iron receiving ladle (3) are arranged at intervals on the support frame (2), and the translation driving member (5) is connected to the support frame (2) and is used to drive the support frame (2) to move horizontally so that one of the iron receiving ladles (3) corresponds to the residual iron chute (13) of the blast furnace body (1) in the upper and lower directions; Wherein, the receiving chute (4) is connected between two adjacent iron receiving ladles (3), and when the translation driving member (5) drives the supporting bracket (2) to move, the receiving chute (4) is used to receive the residual iron discharged from the discharge port of the blast furnace body (1) and guide the residual iron to both ends to flow into the two iron receiving ladles (3) respectively.

2. The blast furnace overhaul residual iron discharge system according to claim 1, characterized in that: The support frame (2) is provided with a lower support seat (21) which is arranged in one-to-one correspondence with the iron connection package (3) and is used to support and limit the position of the iron connection package (3). Two adjacent iron connection packages (3) are connected via a connecting piece (31).

3. The blast furnace overhaul residual iron discharge system according to claim 2, characterized in that: The support frame (2) and the receiving chute (4) extend along the tangent direction of the blast furnace body (1) respectively, the iron receiving ladle (3) is arranged at intervals along the extension direction of the support frame (2), and the central axis of the receiving chute (4) extends along the radial direction of the iron receiving ladle (3).

4. The blast furnace overhaul residual iron discharge system according to claim 3, characterized in that: The receiving chute (4) is connected to the upper edge of the iron receiving bag (3) via a connecting seat (41); the connecting seat (41) has a mounting cavity which opens downward and is used to accommodate the upper edge of the iron receiving bag (3); and a tightening member (42) is threadedly connected to the connecting seat (41) and abuts against the outer wall of the upper edge of the iron receiving bag (3).

5. The blast furnace overhaul residual iron discharge system according to claim 3, characterized in that: The receiving chute (4) has a drainage cavity (43) which opens upward and penetrates along its extension direction, and the cross section of the cavity bottom wall of the drainage cavity (43) is semicircular.

6. The blast furnace overhaul residual iron discharge system according to claim 5, characterized in that: The two ends of the receiving chute (4) respectively extend into two adjacent iron receiving ladles (3), and the two ends of the receiving chute (4) are respectively provided with guide portions (44) extending outward and downward in an arc shape, and the guide portions (44) are used to guide the residual iron into the iron receiving ladles (3).

7. The residual iron discharge system for blast furnace overhaul according to any one of claims 1 to 6, characterized in that: The blast furnace body (1) overhaul residual iron discharge system also includes a translation track (51) extending tangentially along the blast furnace body (1), the support bracket (2) is rollingly connected to the top of the translation track (51), and the translation drive member (5) is a locomotive.

8. The residual iron discharge system for blast furnace overhaul according to claim 7, characterized in that: The two side edges of the receiving chute (4) are respectively provided with a gathering portion (45) for guiding the residual iron into the receiving chute (4), and the gathering portion (45) extends obliquely upward away from the central axis side of the receiving chute (4).

9. The residual iron discharge system for blast furnace overhaul according to any one of claims 1 to 6, characterized in that: The blast furnace overhaul residual iron discharge system also includes a blast furnace cover (11) arranged on the top of the blast furnace body (1) and a pressurized air pump (12) connected to the lower part of the blast furnace body (1), and the pressurized air pump (12) is used to pressurize the blast furnace body (1) so that the residual iron in the blast furnace body (1) can be discharged through the discharge port.

10. The residual iron discharge system for blast furnace overhaul according to any one of claims 1 to 6, characterized in that: An alloy refractory layer is provided on the inner wall of the receiving chute (4).

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